CN113515975B

CN113515975B - Face and iris image acquisition method and device, readable storage medium and equipment

Info

Publication number: CN113515975B
Application number: CN202010277148.5A
Authority: CN
Inventors: 彭程; 周军
Original assignee: Beijing Eyes Intelligent Technology Co ltd; Shenzhen Aiku Smart Technology Co ltd; Beijing Eyecool Technology Co Ltd
Current assignee: Beijing Eyes Intelligent Technology Co ltd; Shenzhen Aiku Smart Technology Co ltd; Beijing Eyecool Technology Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2022-11-08
Anticipated expiration: 2040-04-10
Also published as: US20230024829A1; US12137290B2; EP4109329A1; EP4109329A4; WO2021204211A1; CN113515975A

Abstract

The invention discloses a method and a device for acquiring face and iris images, a readable storage medium and equipment, and belongs to the field of biological recognition. The invention is used for acquiring the area and the position of a light spot on an iris image when a face lens and the iris lens are positioned at acquisition positions and the iris image cannot be positioned, carrying out superposition analysis on the face image and the iris image, judging whether the light spot blocks the iris according to the similar characteristic point information of the face image and the iris image, and if the area of the light spot is overlarge and the iris is blocked, adjusting the angle and the position of a light supplementing source to enable the light spot to avoid the iris area, and then acquiring a clear and available iris image. The iris positioning method avoids the problem of iris positioning failure caused by interference of large light spots, can still accurately judge the position of the iris when the iris is shielded by the light spots, and ensures that the light spots accurately avoid the iris area by adjusting the angle or the position of the light supplementing light source so as to acquire clear and usable iris images.

Description

Face and iris image acquisition method and device, readable storage medium and equipment

Technical Field

The invention relates to the field of biological recognition, in particular to a method and a device for acquiring face and iris images, a readable storage medium and equipment.

Background

The biological recognition technology is closely combined with high-tech means such as optics, acoustics, biosensors and the principle of biometry by a computer, and personal identity is identified by utilizing the inherent physiological characteristics (such as fingerprints, human faces, irises and the like) and behavior characteristics (such as handwriting, voice, gait and the like) of a human body.

The iris, as an important identification feature, has the advantages of lifelong uniqueness, stability, collectability, non-invasiveness and the like, and is a necessary trend of identification research and application development.

The iris is hidden in the eyes deeply, a person wears glasses in the iris information acquisition process, the probability that the iris is shielded by reflection of light of certain lenses is achieved, and the iris data acquisition difficulty is caused by the fact that light spots are generated due to the change of external natural light. Sometimes, users need to hold the glasses, adjust the angle of the glasses, and even remove the glasses, so that the iris information can be successfully acquired.

Chinese patent document CN207037685U discloses an iris collecting device with adjustable illumination, which locates the position of a light spot and an iris in a collected iris image, and adjusts the position of a light supplementing light source according to the light spot locating information and the iris locating information, so that the light spot moves out of an iris area.

However, in many cases, the area of the light spot is too large, so that the whole eye or iris area is blocked, the iris coordinate positioning fails directly, the existence of the coordinates of the iris or iris information cannot be detected, and the position of the light supplement light source cannot be adjusted according to the light spot positioning information and the iris positioning information.

Disclosure of Invention

The invention provides a method, a device, a readable storage medium and equipment for acquiring face and iris images, which avoid the problem of iris positioning failure caused by interference of large light spots, can still accurately judge the position of the iris when the iris is shielded by the light spots, and ensure that the light spots accurately avoid the iris area by adjusting the angle or the position of a light supplementing light source so as to acquire clear and available iris images.

The technical scheme provided by the invention is as follows:

in a first aspect, the present invention provides a method for acquiring images of a face and an iris, wherein a face lens and an iris lens are simultaneously mounted on a first holder, the face lens and the iris lens simultaneously acquire images in real time, and a light supplement light source is mounted on a second holder, the method comprising:

rotating the first holder to enable the face lens and the iris lens to be at the acquisition positions;

simultaneously acquiring a first face image and a first iris image through the face lens and the iris lens under the light supplement of the light supplement light source to the iris lens;

performing iris positioning on the first iris image, if the iris is not positioned, judging whether the light-shading rotation condition is met, and if the light-shading rotation condition is met, rotating the second holder to enable the light spot to avoid the iris area;

wherein, judge whether satisfy and carry out the condition of keeping out of the sun pivoted and include: :

positioning a light spot region on the first iris image, calculating the area of the light spot region, and judging whether the area of the light spot region reaches a set threshold condition;

performing facial feature positioning including human eye positioning on the first facial image, and performing facial feature positioning on the first iris image;

judging whether the light spot region blocks the iris region or not according to the positions of the facial features of the same type on the first face image and the first iris image, the positions of human eyes on the first face image and the position of the light spot region on the first iris image;

if the area of the light spot region reaches the set threshold condition and the iris region is blocked by the light spot region, the condition of light-avoiding rotation is met.

Further, the rotating the first holder to make the face lens and the iris lens located at the collecting position includes:

acquiring a second face image through a face lens;

carrying out human eye positioning on the second face image, and calculating to obtain a first angle of the first holder to be rotated according to the position coordinates of human eyes obtained by positioning and preset reference coordinates;

rotating the first holder according to the first angle, acquiring a second iris image in real time through an iris lens under the light supplement of a light supplement light source in the rotating process of the first holder, and performing iris positioning on the second iris image in real time;

and if the iris is positioned on the second iris image acquired in real time, calculating a second angle of the first holder to be rotated according to the position coordinate of the iris obtained by positioning and a preset reference coordinate, and rotating the first holder according to the second angle.

Further, a first face image and a first iris image are acquired through the face lens and the iris lens under the light supplement of the light supplement light source to the iris lens; carry out iris location on first iris image, if not fix a position the iris, then judge whether satisfy and carry out the condition of keeping away from light and rotate, include:

after the first holder finishes rotating, a first face image and a first iris image are acquired simultaneously through the face lens and the iris lens under the light supplement of the light supplement light source to the iris lens;

performing iris positioning on the first iris image;

if the iris is not positioned on the second iris image after the first holder rotates, and the iris is not positioned on the first iris image, whether the light-shading rotating condition is met or not is judged.

Further, if the iris is positioned on the first iris image, whether the quality of the first iris image meets the requirement is judged, and if not, the second holder is rotated.

Further, in the process of rotating the second holder, a third iris image is acquired in real time through the iris lens under the light supplement of the light supplement light source;

and carrying out spot area positioning and iris positioning on the third iris image in real time, and if the iris is positioned on the third iris image and the spot area leaves the iris area, pausing the second cradle head to wait for the iris lens to carry out image acquisition.

Furthermore, the light supplement light source comprises a plurality of near-infrared light supplement lamps, the plurality of near-infrared light supplement lamps are distributed at different positions around the iris lens, and the plurality of near-infrared light supplement lamps have multiple wavelengths; when the light supplementing light source is used for supplementing light, the near-infrared light supplementing lamps at different positions are alternately turned on, and the wavelengths of the near-infrared light supplementing lamps which are simultaneously turned on at each time are the same.

Further, the positioning the light spot region on the first iris image and calculating the area of the light spot region include:

counting the gray values of all pixel points on the first iris image, and if the gray values of a plurality of continuous pixel points exceed a set value, determining a region formed by the pixel points as a light spot region;

counting the number of pixels n and n' in the transverse direction and the longitudinal direction of the light spot region, and calculating the area S of the light spot region by the following formula:

S＝(2*n*x*tan(θ/2)/m) ² *n’/n；

wherein m is the number of horizontal pixels of the first iris image, theta is the field angle of the iris lens, and x is the shooting distance from the iris lens to the user;

the facial feature positioning including human eye positioning is performed on the first face image, and the facial feature positioning is performed on the first iris image, and then, the method further includes:

and rotating the first holder according to the position of the facial feature on the first face image and/or the position of the facial feature on the first iris image, wherein the position is obtained by positioning the facial feature on the first face image, and/or the position is obtained by positioning the facial feature on the first iris image.

In a second aspect, the present invention provides a face and iris image capturing device, wherein a face lens and an iris lens are simultaneously mounted on a first holder, the face lens and the iris lens simultaneously perform image capturing in real time, and a light supplement light source is mounted on a second holder, the device comprising:

the first rotating module is used for rotating the first holder to enable the face lens and the iris lens to be positioned at the collecting position;

the first acquisition module is used for acquiring a first face image and a first iris image simultaneously through the face lens and the iris lens under the light supplement of the light supplement light source to the iris lens;

the first positioning module is used for carrying out iris positioning on the first iris image, judging whether the conditions for carrying out light-shading rotation are met or not if the first iris image is not positioned on the first iris image, and rotating the second holder if the first iris image is not positioned on the second iris image so that the light spots avoid the iris area;

wherein, judge whether satisfy the condition of carrying out the rotation of keeping out of the sun through following module:

the second positioning module is used for positioning a light spot region on the first iris image, calculating the area of the light spot region and judging whether the area of the light spot region reaches a set threshold value condition or not;

the third positioning module is used for carrying out facial feature positioning including human eye positioning on the first human face image and carrying out facial feature positioning on the first iris image;

the first judging module is used for judging whether the iris area is blocked by the light spot area or not according to the positions of the facial features of the same type on the first face image and the first iris image, the positions of human eyes on the first face image and the position of the light spot area on the first iris image;

and the second judgment module is used for meeting the condition of light-avoiding rotation if the area of the light spot region reaches the set threshold condition and the iris region is blocked by the light spot region.

Further, the first rotating module includes:

the first acquisition unit is used for acquiring a second face image through the face lens;

the first positioning unit is used for carrying out human eye positioning on the second human face image and calculating a first angle of the first holder to be rotated according to the position coordinates of human eyes obtained by positioning and preset reference coordinates;

the first rotating unit is used for rotating the first holder according to the first angle, acquiring a second iris image in real time through an iris lens under the light supplement of a light supplement light source in the rotating process of the first holder, and performing iris positioning on the second iris image in real time;

and the second rotating unit is used for calculating a second angle of the first holder to be rotated according to the iris position coordinate obtained by positioning and a preset reference coordinate if the iris is positioned on the second iris image acquired in real time, and rotating the first holder according to the second angle.

Further, the first acquisition module and the first positioning module comprise:

the second acquisition unit is used for acquiring a first face image and a first iris image simultaneously through the face lens and the iris lens under the light supplement of the light supplement light source to the iris lens after the first holder rotates;

the second positioning unit is used for carrying out iris positioning on the first iris image;

and the judging unit is used for judging whether the light-shading rotating condition is met or not if the iris is not positioned on the second iris image after the first holder rotates, and the iris is not positioned on the first iris image.

Further, if the first iris image is positioned on the iris, whether the quality of the first iris image meets the requirement is judged, and if not, the second holder is rotated.

and carrying out spot area positioning and iris positioning on the third iris image in real time, and if the iris is positioned on the third iris image and the spot area leaves the iris area, pausing the second cradle head and waiting for the iris lens to carry out image acquisition.

Further, the light supplement light source comprises a plurality of near-infrared light supplement lamps, the plurality of near-infrared light supplement lamps are distributed at different positions around the iris lens, and the plurality of near-infrared light supplement lamps have various wavelengths; when the light supplementing light source is used for supplementing light, the near-infrared light supplementing lamps at different positions are alternately turned on, and the wavelengths of the near-infrared light supplementing lamps which are simultaneously turned on at each time are the same.

Further, the second positioning module includes:

the light spot area determining unit is used for counting gray values of all pixel points on the first iris image, and if the gray values of a plurality of continuous pixel points exceed a set value, an area formed by the pixel points is a light spot area;

the area calculating unit is used for counting the pixel numbers n and n' of the light spot region in the transverse direction and the longitudinal direction, and calculating the area S of the light spot region through the following formula:

S＝(2*n*x*tan(θ/2)/m) ² *n’/n；

wherein m is the number of horizontal pixels of the first iris image, theta is the field angle of the iris lens, and x is the shooting distance from the iris lens to a user;

the apparatus further comprises, after the third positioning module:

and the correction unit is used for rotating the first holder according to the position of the facial feature positioned on the first face image and/or the position of the facial feature positioned on the first iris image.

In a third aspect, the present invention provides a computer readable storage medium for face and iris image acquisition, comprising a memory for storing processor executable instructions which, when executed by the processor, implement steps comprising the face and iris image acquisition method of the first aspect.

In a fourth aspect, the present invention provides an apparatus for face and iris image acquisition, comprising at least one processor and a memory storing computer executable instructions, which when executed by the processor, implement the steps of the face and iris image acquisition method of the first aspect.

The invention has the following beneficial effects:

the invention utilizes the characteristic points and the light spot data of the overlapping area shot by the face image and the iris image to avoid the problem of iris positioning failure caused by large light spot interference, can still accurately judge the position of the iris when the iris is shielded by the light spot, and ensures that the light spot accurately avoids the iris area by adjusting the angle or the position of the light supplementing light source so as to acquire a clear and available iris image. .

Drawings

FIG. 1 is a flow chart of a face and iris image acquisition method of the present invention;

FIG. 2 is a schematic view of an acquisition position;

fig. 3 to 5 are schematic diagrams of the light supplement module at an upper position, a middle position and a lower position, respectively;

fig. 6 is a schematic diagram of a face and iris image acquisition device of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

the embodiment of the invention provides a face and iris image acquisition method, which is suitable for equipment with two groups of imaging modules of a face lens and an iris lens.

The first holder and the second holder can rotate up and down and/or left and right, the invention does not limit the specific structure of the holders, for example, the holders can be electric two-dimensional holders (which can rotate up and down and left and right) controlled by stepping motors, or simple rotating shafts (which can only rotate up and down or left and right in one dimension), and the rotating shafts are controlled by the stepping motors.

As shown in fig. 1, the method includes:

s100: and rotating the first holder to enable the face lens and the iris lens to be positioned at the acquisition positions.

The face lens and the iris lens are located at the collecting positions, namely when the first holder rotates to a certain position, the face lens and the iris lens can collect a face image and an iris image, and the face and the iris are approximately located at the central position of the image.

The first holder can be driven by a motor, the collecting position can be a fixed position and is suitable for collecting users with fixed height ranges, the collecting position can also be changed according to the heights of the users and is suitable for collecting users with different heights, and the invention is not limited to the above.

One example of the first pan-tilt angle may be implemented as follows: firstly, a reference coordinate is preset, an iris image can be acquired at the reference coordinate, and the position of human eyes is in the middle of the image. And then positioning the position coordinates of human eyes on the acquired face image or iris image, converting the position coordinates of the human eyes into the angle of the stepping motor to be rotated according to the pixel difference between the position coordinates of the human eyes and the reference coordinates, and sending a rotation instruction to the motor to prepare for rotation.

S200: and simultaneously acquiring a first face image and a first iris image through the face lens and the iris lens under the light supplement of the light supplement light source to the iris lens.

In the rotating process of the first holder, the face image and the iris image can be collected in real time, and the rotation of the first holder is corrected according to the face image and the iris image which are collected in real time, and certainly, the correction can be omitted.

After the first holder rotates, the face lens and the iris lens reach the collecting position, colleagues collect the face image and the first iris image, and the first face image and the first iris image can be used for subsequent face iris recognition authentication, face iris living body detection and the like.

S300: and carrying out iris positioning on the first iris image, judging whether the conditions for carrying out light-shading rotation are met or not if the first iris image is not positioned to the iris, and rotating the second holder if the conditions are met so that the light spot avoids the iris area.

In the prior art, in order to enable the light spots to avoid the iris area, the positions of the light spots and the iris are located in the collected iris image, and the position of the light supplementing light source is adjusted according to the light spot locating information and the iris locating information, so that the light spots move out of the iris area.

However, in the application process of the real scene, in order to adapt to more application environments, a large-area light supplementing light source is often needed to supplement light, and in this time, the light reflecting light spots can be increased, and when the ambient light in the real scene is not ideal (if the illumination is too strong), the light reflecting light spots in a large area can also appear. The large-area light spot sometimes even completely blocks the whole iris area, so that the iris detection algorithm cannot complete iris coordinate positioning on an iris image, the position of the light supplementing light source cannot be adjusted according to the light spot positioning information and the iris positioning information, the position of the light supplementing light source cannot be adjusted, and the light spot is moved out of the iris area.

The present invention is intended to solve this drawback of the prior art, in the case where the iris is not positioned on the first iris image, it may happen that the above-mentioned light spots completely block the entire iris area, possibly requiring the rotation of the second head. The invention firstly judges whether the conditions for carrying out the light-shading rotation are met, namely whether the second tripod head needs to be rotated, and if the conditions are met, the second tripod head is rotated, so that the light spots avoid the iris area. The rotating angle and direction of the second holder can be set as required, the iris image is collected again in the process of the second holder or after the second holder rotates, and the collected iris image can be used for subsequent iris recognition or living body detection and the like.

Wherein, judge whether satisfy and carry out the condition of keeping away from light rotation and include:

s100': and positioning a light spot region on the first iris image, calculating the area of the light spot region, and judging whether the area of the light spot region reaches a set threshold condition.

In the step, the light spot area can be positioned by counting the gray value of each pixel point on the first iris image, and the light spot area is brighter and has a larger gray value, so that the light spot area can be positioned by the gray value.

The area of the light spot region can be obtained through calculation of the number of the pixel points of the light spot region, whether the area of the light spot region reaches a set threshold condition is further judged, and the set threshold condition is that the area of the light spot region is generally larger than the area of the iris (generally, the area of the iris is 1 cm) ² ) More than half of the total.

S200': facial feature localization including human eye localization is performed on the first face image, and facial feature localization is performed on the first iris image.

Since the iris image is an image of a partial region of the face (both eyes and a partial region around the eyes), and the iris image is a near-infrared black-and-white image, the face image is a color image of the entire face. Therefore, the color image of the face is naturally more than the face features (the feature information points such as the nose, the lips, the eyebrows, the eye examination and the like) on the iris black-and-white image, when the iris cannot be positioned on the iris image, the position of the eyes can be positioned on the face image based on the same angle, and the feature point positioning algorithm of the face image is also characterized.

S300': and judging whether the light spot region blocks the iris region or not according to the positions of the facial features of the same type on the first face image and the first iris image, the positions of the human eyes on the first face image and the positions of the light spot region on the first iris image.

The invention adopts two paths of acquisition lenses, namely the face lens and the iris lens, and can simultaneously complete the acquisition of face and iris information at the same distance. And the human face field angle is larger than the iris field angle, so that the region collected by the human face lens can completely cover the region collected by the iris lens. The largest difference between the two pictures of the same area is the position of the light spot. The difference value between the overlapped areas collected by the two lenses is calculated through an algorithm, the position of the light spot can be accurately calculated, and the influence on iris positioning when the light spot is too large is not considered, so that the next light spot removing operation cannot be carried out.

Specifically, the method comprises the following steps: the first face image and the first iris image are subjected to superposition analysis, the positions of the human eyes on the first iris image can be obtained according to the positions of the characteristic information points such as the nose, the lips, the eyebrows and the eye examinations obtained by positioning on the first face image, the positions of the same type of characteristic points in the characteristic information points such as the nose, the lips, the eyebrows and the eye examinations obtained by positioning on the first iris image and the positions of the human eyes on the first face image, and the accurate positions of the light spot regions can be judged by combining the positions of the light spot regions obtained by positioning on the first iris image in S100', so that whether the iris regions are blocked by the light spot regions or not is obtained.

S400': if the area of the light spot region reaches the set threshold condition and the iris region is blocked by the light spot region, the condition of light-avoiding rotation is met.

In this step, if the area of the light spot region reaches the set threshold condition, it is indicated that the light spot is a large light spot, and the area of the large light spot is generally larger than a half of the area of the iris, and if the light spot region blocks the iris region, the second holder needs to be rotated to adjust the angle and the position of the light supplementing light source, so that the light spot avoids the iris region.

The face and iris image acquisition method is used for acquiring the area and the position on an iris image when a face lens and an iris lens are positioned at acquisition positions and an iris cannot be positioned in the iris image, performing superposition analysis on the face image and the iris image, judging whether a light spot blocks the iris according to the similar characteristic point information of the face image and the iris image, and if the light spot is too large in area and blocks the iris, adjusting the angle and the position of a light supplementing source to enable the light spot to avoid the iris area, so that a clear and available iris image can be acquired. The problem of unable spot removal iris regional on the iris image just can't be located among the prior art is solved.

In summary, the invention utilizes the feature points and the light spot data of the overlapping area shot by the face image and the iris image to avoid the problem of iris positioning failure caused by large light spot interference, can still accurately judge the position of the iris when the iris is shielded by the light spot, and enables the light spot to accurately avoid the iris area by adjusting the angle or the position of the light supplementing light source so as to acquire a clear and available iris image.

In the process of iris recognition, iris information of a user needs to be quickly and accurately captured, but the iris area of each person is small (the diameter is about 1 cm), iris recognition has very high requirements on the definition and the number of pixels of an iris image, and the number of pixels captured by the iris area is usually about 20 pixels/mm, so that the field angle of an iris lens cannot be too large. Most producers can all adopt a set of near-infrared light filling lamp to match a fixed iris acquisition module to carry out the matched type collection under the fixed environment to iris information at present, and this crowd that just requires different heights needs adaptation height to gather iris information by oneself, leads to traditional iris acquisition equipment gathering iris in-process, all can face the problem that depth of field is little, the height degree of adaptability is high.

To automatically adapt to iris acquisition for users of different heights, S100 of the present invention comprises:

s110: and acquiring a second face image through the face lens.

The first face image and the second face image are only used for distinguishing and naming the face images acquired at different moments, and do not represent the acquisition sequence.

S120: and carrying out human eye positioning on the second face image, and calculating to obtain a first angle of the first holder to be rotated according to the position coordinates of human eyes obtained by positioning and preset reference coordinates.

Because the field angle of the face lens is larger, the face image is easier to detect human eyes, and therefore, the invention firstly preliminarily calculates the rotation angle of the first holder according to the eye coordinates on the second face image, namely the first angle.

Specifically, when the first holder can rotate in two dimensions, a transverse rotation angle and a longitudinal rotation angle are calculated according to pixel differences between a horizontal ordinate and a vertical ordinate of the human eye position respectively; when the pan/tilt head can only rotate up and down or left and right in one dimension (because the invention is mostly suitable for users with different heights, the one-dimensional rotation is generally up and down rotation), the horizontal rotation angle or the vertical rotation angle (generally vertical) can be calculated according to the pixel difference between the horizontal coordinate or the vertical coordinate (generally vertical coordinate) of the position of the human eye and the reference horizontal coordinate or the vertical coordinate.

S130: and rotating the first holder according to the first angle, acquiring a second iris image in real time through an iris lens under the light supplement of a light supplement light source in the rotating process of the first holder, and performing iris positioning on the second iris image in real time.

S140: and if the iris is positioned on the second iris image acquired in real time, calculating a second angle of the first holder to be rotated according to the position coordinate of the iris obtained by positioning and a preset reference coordinate, and rotating the first holder according to the second angle.

Although the field angle of the iris lens is smaller, the resolution is higher, so that in the rotating process, if human eyes are found on the second iris image, the rotating angle is corrected according to the second iris image to obtain a second angle, and the rotating angle of the first holder is more accurate.

When the first cloud platform is rotated according to the first angle, the front part of the first angle rotates at the first speed, the rear part rotates at the second speed, and in the process that the rear part rotates at the second speed, whether eyes appear on a first iris image acquired by an iris lens in real time is detected in real time; rotating at a third speed when the first platform is rotated according to a second angle; wherein the first speed > the second speed > the third speed.

One specific example is: the first 70% of the first angle rotates at a high speed, the second 30% of the first angle starts to decelerate, and the iris lens is used for starting to judge whether eyes appear frame by frame; in the rotating process, once the iris lens finds iris position information data, the iris coordinate pixel number is immediately obtained, the pixel number difference value of the iris coordinate and the reference coordinate is calculated for the second time, the rotating numerical value of the rotating stepping motor is given according to the pixel difference value, and then the first holder rotates for the second time.

In the process of secondary rotation, the rotation speed at the moment is slower than that of the previous rotation and is more stable, image acquisition and quality judgment (including whether characteristic points including eyes are positioned or not, whether the images are fuzzy or not and the like) operations of the face and iris information can be started simultaneously, if the quality judgment is qualified, biological characteristics of the acquired face and iris image information are extracted and loaded into a memory for a subsequent comparison process.

The invention rotates the first holder by combining the human eye positioning (primary positioning) and the iris positioning (secondary positioning), so that the human face lens is quickly positioned at one time, the iris lens is accurately positioned at the second time, and the adaptation of the height and the position of the user can be quickly and accurately realized.

One specific example thereof is (taking the up-and-down rotation of the first pan/tilt head as an example):

firstly, a face camera is opened to collect a second face image, face information is positioned, so that eye coordinate information is found, pixel difference between positions (namely collection positions) where an iris can be found from a target is calculated according to a longitudinal axis data value and a reference longitudinal coordinate of eye coordinate position information, a rotation value of a stepping motor is converted according to the difference value, a rotation instruction is sent to the motor of the first holder, and the motor is ready to rotate.

In the process of rotating the motor, once the iris lens finds the iris position information data, the number of pixels of the longitudinal coordinate of the iris is immediately obtained, the number difference value between the longitudinal coordinate of the iris and the reference longitudinal coordinate is calculated for the second time, the rotating numerical value of the stepping motor is given according to the pixel difference value, and the iris lens is rotated to the position (namely, the acquisition position) where the iris is centered up and down on the iris image, as shown in fig. 2.

The aforementioned S200 and S300 include:

s210: after the first holder rotates, a first face image and a first iris image are acquired through the face lens and the iris lens simultaneously under the light supplement of the light supplement light source to the iris lens.

S220: performing iris positioning on the first iris image;

s230: if the iris is not positioned on the second iris image after the first holder rotates, and the iris is not positioned on the first iris image, whether the light-shading rotating condition is met or not is judged.

That is, the present invention first ensures that the face shot has been shot once for eye positioning (S120), and the iris shot and the face shot have been rotated to the desired position with proper height. However, because the light spot is too large, the secondary coordinate of the iris cannot be located in the iris image in the whole rotation process of the lens in the step S130, and the iris cannot be located in the iris image after the lens is rotated, and at this time, it is necessary to consider whether the second pan-tilt is rotated to avoid light, that is, whether the conditions for rotating to avoid light are met, that is, the steps S100 'to S400' are performed.

The iris lens mostly adopts a near-infrared active supplementary lighting light source for data acquisition, but the irises of people of different ethnic groups have certain tendencies to the near-infrared light sources of different wave bands. For example, the light source of 910nm is more suitable for European and American people, and the light source of 810-850nm is more suitable for Asian people. If the light sources adapted to the eyes are not matched, certain trouble is brought to iris acquisition.

In order to solve the problems, the light supplementing light source comprises a plurality of near-infrared light supplementing lamps, the plurality of near-infrared light supplementing lamps are distributed at different positions around an iris lens, and the plurality of near-infrared light supplementing lamps have various wavelengths; when the light supplementing light source is used for supplementing light, the near-infrared light supplementing lamps at different positions are alternately turned on, and the wavelengths of the near-infrared light supplementing lamps which are simultaneously turned on at each time are the same.

Near-infrared light supplement lamps with various wavelengths are designed beside the iris lens, and the adaptation of various groups to near-infrared light sources is compensated by adopting an alternate flashing mode.

In a specific example, the near-infrared fill light comprises 12 fill light lamps A1, A2, A3, A4, B1, B2, B3, B4, C1, C2, C3, C4, wherein the wavelengths of A1-A4 are 810nm, the wavelengths of B1-B4 are 850nm, and the wavelengths of C1-C4 are 910nm.12 light filling lamps divide into two light filling modules, 6 light filling lamps of every light filling module, and two light filling modules are in iris camera lens left and right sides symmetry setting.

In the light supplementing module on the left side, the left side of the uppermost row is A1, the right side of the uppermost row is C2, the left side of the middle row is B1, the right side of the middle row is A2, the left side of the lowermost row is C1, and the right side of the lowermost row is B2; in the light filling module on right side, the one row of the top left side is C3, the right side is A4, the one row of the middle left side is A3, the right side is B4, the one row of the bottom left side is B3, and the right side is C4. As shown in fig. 3.

The 12 supplementary lighting lamps are divided into six groups to flash alternately (A1, A4), (A2, A3), (B1, B4), (B2, B3), (C1, C4), (C2, C3), and each group lights for 100-150ms. Can satisfy the near infrared light adaptability of different ethnic groups crowd's iris like this, can follow a plurality of angles again and carry out the light filling, avoid because the glasses facula reflection of light that led reflected light arouses shelters from the iris, a plurality of light filling lamps do not design into a water flat line, are exactly in order to stagger the facula.

The invention also includes;

s400: and if the first iris image is positioned on the iris, judging whether the quality of the first iris image meets the requirement, and if not, rotating the second holder.

Although the iris lens can alternatively flash through the six groups of light rays to avoid the light spots of the glasses, sometimes the interference of external stray light causes a user to hold the glasses and find an angle to acquire the iris successfully.

That is, if the iris is located on the first iris image in S300, it indicates that the iris region is not completely blocked by the light spot, and at this time, it may be determined whether the quality of the first iris image (mainly, the sharpness of the image, etc.) meets the requirement, and if so, the living body detection and identification operation may be performed using the iris image; if the requirement is not met, it is indicated that clear binocular iris images still cannot be acquired when the ends of the iris are located at the effective acquisition positions, at this time, the interference of small light spots on the iris area or the partial shielding of the iris area may occur, or the light supplement position of the light supplement light source may be improper, and the like, so that the user needs to hold the glasses or find an angle to acquire clear back-scale images.

According to the invention, the user does not need to hold the glasses or look for the angle, but the second holder is rotated, so that the light supplementing light source rotates upwards or downwards, the position of the light supplementing light source is adjusted, light supplementing is carried out in an upward or downward mode, and the interference of light spots is eliminated.

The step realizes that after iris positioning is finished, if the light supplementing light source has an upper position, a middle position and a lower position (as shown in fig. 3-5, and fig. 4, fig. 3 and fig. 5 are the upper position, the middle position and the lower position respectively) once the light supplementing light source meets the phenomenon of light reflection of the lens, automatic state adjustment and adaptation can be carried out, and interference of light spots of an external light source is avoided quickly.

The method of the present invention further comprises:

s500: in the process of the rotation of the second holder (including the rotation of the second holder in S400 and S400'), a third iris image is acquired in real time through the iris lens under the supplementary lighting of the supplementary lighting light source. And simultaneously acquiring a third iris image and a third face image through the face lens.

In the invention, the first iris image, the second iris image and the third iris image are named according to the appearance sequence of the character part instead of the acquisition time sequence. When the iris images are sorted according to the sequence of the acquisition time, the sequence is the second iris image, the first iris image and the third iris image. Similarly, when the images are sorted according to the sequence of the acquisition time, the sequence is the second face image, the first face image and the third face image.

S600: and carrying out spot area positioning and iris positioning on the third iris image in real time, and if the iris is positioned on the third iris image and the spot area leaves the iris area, pausing the second cradle head and waiting for the iris lens to carry out image acquisition.

The invention can detect the coordinates of the light spots and the iris through an algorithm, and if the two coordinates are overlapped, the light supplementing module needs to rotate to avoid the overlapping. When the iris module rotates to the position where the light spot and the iris coordinate are found to be far away, the second holder is stopped properly, and the iris module is waited to capture an effective iris image for subsequent identification, living body detection and other processing.

The aforementioned positioning of the spot region on the first iris image, and calculating the area of the spot region (S100') includes:

s110': and counting the gray values of all pixel points on the first iris image, and if the gray values of a plurality of continuous pixel points exceed a set value, determining that the area formed by the pixel points is a light spot area.

According to statistics, the gray value of the facula is generally larger than 200, the number of transverse images of the binocular iris lens is generally larger than 1920pix, and therefore if more than 200 continuous pixels of more than 10pix are detected on the iris image, the area can be defined as the facula area.

S120': counting the number n and n' of pixels in the transverse direction and the longitudinal direction of the light spot region, and calculating the area S of the light spot region by the following formula:

S＝(2*n*x*tan(θ/2)/m) ² *n’/n；

wherein m is the number of horizontal pixels of the first iris image, theta is the field angle of the iris lens, and x is the shooting distance from the iris lens to the user.

The derivation of the above equation is as follows:

the transverse length h (cm) of the first iris image can be calculated according to the field angle theta of the iris lens and the shooting distance x (cm) from the iris lens to the user;

h＝2*tan(θ/2)*x；

then, the transverse length y (cm), the longitudinal length y' (cm) and the area S (cm) of the light spot can be calculated by the following formulas ² )；

y＝h*n/m＝2*tan(θ/2)*x*n/m

y’＝y*n’/n＝(2*tan(θ/2)*x*n/m)*n’/n

S＝y*y’＝(2*n*x*tan(θ/2)/m) ² *n’/n。

Assuming that the number m of horizontal pixels of the first iris image is 1920pix, the field angle theta is 18 degrees, the shooting distance x is 40cm, the horizontal and vertical directions of the light spot are 160 pixels, and the finally calculated area of the light spot is approximately equal to 1cm ² 。

After S200', the present invention further includes:

s210': and rotating the first holder according to the position of the facial feature on the first face image and/or the position of the facial feature on the first iris image, wherein the position is obtained by positioning on the first face image.

The method comprises the steps of verifying whether an iris lens and a face lens are really at preset acquisition positions, if eyebrow characteristic information exists in two images and the images are centered or inclined downwards, representing that the positions of the images are higher, and properly rotating a first holder downwards; if the mouth or nose characteristic information is found in both images and is upward, the representative picture position is low, and the first pan-tilt head needs to be rotated upward properly.

After the first holder is rotated, the iris is determined to be in the middle area, then the subsequent steps are carried out, and the light supplementing light source is rotated up and down through the second holder to be adjusted and controlled (S300 '-S400'), so that the interference of light spots of the external light source is avoided forcibly.

In summary, the embodiments of the present invention have the following beneficial effects:

1. the invention adopts the face lens and the iris lens which can rotate simultaneously, automatically adapts to users with different heights/distances by utilizing a secondary positioning mode, and quickly and accurately captures the face and iris information of the users under the condition of almost not needing any cooperation of the users.

2. The invention utilizes the light supplementing lamps with various wavelengths and the alternate flashing form of a plurality of groups of light supplementing lamps, avoids the problem that the iris information of different ethnic groups is not matched with the near infrared light, and can adapt to the acquisition of the iris information data of different ethnic groups of users.

3. The invention simulates the process of holding the glasses to avoid light spots by a user by utilizing the flickering and up-and-down movement of a plurality of groups of light supplementing light sources at different positions, avoids the influence of the light spots generated in the process of irradiating the glasses by LED near infrared light, and completes high-efficiency iris acquisition automatically, efficiently and without cooperation.

4. By using the overlapping area shot by the face lens and the iris lens and the light spot data, the problem of iris positioning failure caused by interference of large light spots is avoided.

Example 2:

the embodiment of the invention provides a face and iris image acquisition device, wherein a face lens and an iris lens are simultaneously installed on a first cloud deck, the face lens and the iris lens simultaneously acquire images in real time, and a light supplementing light source is installed on a second cloud deck.

As shown in fig. 6, the apparatus includes:

the first rotating module 1 is used for rotating the first holder, so that the face lens and the iris lens are located at the collecting positions.

And the first acquisition module 2 is used for acquiring a first face image and a first iris image simultaneously through the face lens and the iris lens under the light supplement of the light supplement light source to the iris lens.

And the first positioning module 3 is used for carrying out iris positioning on the first iris image, judging whether the light-shading rotating condition is met or not if the iris image is not positioned, and rotating the second holder if the light-shading rotating condition is met so that the light spot avoids the iris area.

and the second positioning module is used for positioning the light spot region on the first iris image, calculating the area of the light spot region and judging whether the area of the light spot region reaches a set threshold value condition.

And the third positioning module is used for carrying out facial feature positioning including human eye positioning on the first human face image and carrying out facial feature positioning on the first iris image.

The first judging module is used for judging whether the iris area is blocked by the light spot area or not according to the positions of the facial features of the same type on the first face image and the first iris image, the positions of the human eyes on the first face image and the position of the light spot area on the first iris image.

The invention utilizes the characteristic points and the light spot data of the overlapping area shot by the face image and the iris image to avoid the problem of iris positioning failure caused by large light spot interference, can still accurately judge the position of the iris when the iris is shielded by the light spot, and ensures that the light spot accurately avoids the iris area by adjusting the angle or the position of the light supplementing light source so as to acquire a clear and available iris image.

The first rotating module comprises:

and the first acquisition unit is used for acquiring a second face image through the face lens.

And the first positioning unit is used for carrying out human eye positioning on the second face image and calculating to obtain a first angle of the first holder required to rotate according to the position coordinates of human eyes obtained by positioning and preset reference coordinates.

And the first rotating unit is used for rotating the first holder according to the first angle, acquiring a second iris image in real time through the iris lens under the light supplement of the light supplement light source in the rotating process of the first holder, and performing iris positioning on the second iris image in real time.

The first acquisition module and the first positioning module comprise:

and the second acquisition unit is used for acquiring a first face image and a first iris image simultaneously through the face lens and the iris lens under the light supplement of the light supplement light source to the iris lens after the first holder rotates.

And the second positioning unit is used for carrying out iris positioning on the first iris image.

The invention firstly ensures that the human eye positioning is finished once when the human face lens is shot, and the iris lens and the human face lens rotate to the expected position with proper height. However, because the light spot is too large, the secondary coordinate positioning of the iris cannot be completed in the iris image in the whole rotating process of the lens, and the iris cannot be positioned in the iris image after the lens rotates, so that the judgment of whether the second holder is rotated in a light-avoiding manner or not needs to be considered, and the judgment of whether the light-avoiding rotation condition is met or not is judged.

And if the first iris image is positioned on the iris, judging whether the quality of the first iris image meets the requirement, and if not, rotating the second holder.

The second holder is rotated to enable the light supplementing light source to rotate upwards or downwards, the position of the light supplementing light source is adjusted, light supplementing is conducted in an upward or downward mode, interference of light spots is eliminated, and the method is equivalent to the action of simulating a user to hold up and down glasses to find angles.

And in the process of rotating the second holder, acquiring a third iris image in real time through the iris lens under the light supplement of the light supplement light source.

The invention can detect the coordinates of the light spots and the iris through an algorithm, and if the two coordinates are superposed, the light spot coordinates and the iris coordinates can be avoided through the rotation of the light supplementing module. When the iris module rotates to the position where the light spot and the iris coordinate are found to be far away, the second holder is stopped properly, and the iris module is waited to capture an effective iris image for subsequent identification, living body detection and other processing.

The light supplementing light source comprises a plurality of near-infrared light supplementing lamps, the plurality of near-infrared light supplementing lamps are distributed at different positions around an iris lens, and the plurality of near-infrared light supplementing lamps have various wavelengths; when the light supplementing light source is used for supplementing light, the near-infrared light supplementing lamps at different positions are alternately turned on, and the wavelengths of the near-infrared light supplementing lamps which are simultaneously turned on at each time are the same.

The second positioning module comprises:

and the light spot region determining unit is used for counting the gray values of all pixel points on the first iris image, and if the gray values of a plurality of continuous pixel points exceed a set value, the region formed by the pixel points is the light spot region.

S＝(2*n*x*tan(θ/2)/m) ² *n’/n；

The apparatus further comprises, after the third positioning module:

and the correcting unit is used for rotating the first holder according to the position of the facial feature positioned on the first face image and/or the position of the facial feature positioned on the first iris image.

4. The problem of iris positioning failure caused by interference of large light spots is avoided by using the overlapping area shot by the face lens and the iris lens and light spot data.

The device provided by the embodiment of the present invention, which has the same implementation principle and the same technical effects as those of the foregoing method embodiment 1, for brief description, reference may be made to the corresponding contents in the foregoing method embodiment 1 for the part where the embodiment of the device is not mentioned. It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the apparatus and the unit described above may all refer to the corresponding processes in the above method embodiment 1, and are not described herein again.

Example 3:

the method provided by this specification and described in the above embodiment 1 can implement the service logic through a computer program and record the service logic on a storage medium, and the storage medium can be read and executed by a computer, so as to achieve the effect of the solution described in embodiment 1 of this specification. Accordingly, the present invention also provides a computer readable storage medium for face and iris image acquisition, comprising a memory for storing processor executable instructions which, when executed by a processor, implement the steps comprising the face and iris image acquisition method of embodiment 1.

The storage medium may include a physical device for storing information, and typically, the information is digitized and then stored using an electrical, magnetic, or optical media. The storage medium may include: devices that store information using electrical energy, such as various types of memory, e.g., RAM, ROM, etc.; devices that store information using magnetic energy, such as hard disks, floppy disks, tapes, core memories, bubble memories, and usb disks; devices that store information optically, such as CDs or DVDs. Of course, there are other ways of storing media that can be read, such as quantum memory, graphene memory, and so forth.

The device described above may also include other implementations in accordance with the description of method embodiment 1. The specific implementation manner may refer to the description of the related method embodiment 1, and details are not described herein.

Example 4:

the invention also provides a device for acquiring the face and iris images, which can be a single computer, and can also comprise a practical operation device and the like using one or more methods or devices of one or more embodiments of the specification. The apparatus for face and iris image acquisition may comprise at least one processor and a memory storing computer executable instructions which, when executed by the processor, implement the steps of the face and iris image acquisition method of any one or more of embodiments 1 above.

The description of the above-described device according to the method or apparatus embodiment may also include other implementation manners, and a specific implementation manner may refer to the description of related method embodiment 1, which is not described in detail herein.

It should be noted that, the above-mentioned apparatus or system in this specification may also include other implementation manners according to the description of the related method embodiment, and a specific implementation manner may refer to the description of the method embodiment, which is not described herein in detail. The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the embodiments of hardware + program class, storage medium + program, since they are basically similar to the embodiments of the method, the description is relatively simple, and the relevant points can be referred to the partial description of the embodiments of the method.

The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a vehicle-mounted human-computer interaction device, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, when implementing one or more of the present description, the functions of each module may be implemented in one or more software and/or hardware, or a module implementing the same function may be implemented by a combination of multiple sub-modules or sub-units, etc. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may therefore be considered as a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of additional like elements in a process, method, or apparatus that comprises the element.

As will be appreciated by one skilled in the art, one or more embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, one or more embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, one or more embodiments of the present description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

One or more embodiments of the specification may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. One or more embodiments of the present specification can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. In the description of the specification, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the present invention in its spirit and scope. Are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A face and iris image acquisition method is characterized in that a face lens and an iris lens are simultaneously installed on a first cloud deck, the face lens and the iris lens simultaneously acquire images in real time, and a light supplementing light source is installed on a second cloud deck, and the method comprises the following steps:

rotating the first holder to enable the face lens and the iris lens to be located at the acquisition positions;

performing iris positioning on the first iris image, if the iris is not positioned, judging whether the conditions for performing light-shading rotation are met, and if the conditions are met, rotating the second holder to enable the light spots to avoid the iris area;

wherein, judge whether satisfy and carry out the condition of keeping out of the sun pivoted and include:

if the area of the light spot region reaches the set threshold condition and the iris region is blocked by the light spot region, the condition of light-shading rotation is met.

2. The face and iris image capturing method of claim 1, wherein said rotating the first pan/tilt head so that the face lens and the iris lens are at the capturing position comprises:

acquiring a second face image through a face lens;

3. The face and iris image capturing method as claimed in claim 2, wherein the first face image and the first iris image are captured simultaneously by the face lens and the iris lens under the supplementary lighting of the iris lens by the supplementary lighting source; carry out the iris location on first iris image, if do not fix a position the iris, then judge whether satisfy and carry out light-resistant pivoted condition, include:

after the first holder rotates, a first face image and a first iris image are acquired through the face lens and the iris lens simultaneously under the light supplement of the light supplement light source to the iris lens;

performing iris positioning on the first iris image;

4. The face and iris image capturing method of claim 3, wherein if the first iris image is positioned on the iris, determining whether the quality of the first iris image meets the requirements, and if not, rotating the second pan/tilt head.

5. The face and iris image acquisition method of any one of claims 1 to 4, wherein in the process of the rotation of the second holder, a third iris image is acquired in real time through the iris lens under the light supplement of the light supplement light source;

6. The face and iris image capturing method of claim 5, wherein the fill-in light source comprises a plurality of near infrared fill-in lights, the plurality of near infrared fill-in lights are distributed at different positions around the iris lens, and the plurality of near infrared fill-in lights have a plurality of wavelengths; when the light supplementing light source is used for supplementing light, the near-infrared light supplementing lamps at different positions are alternately turned on, and the wavelengths of the near-infrared light supplementing lamps which are simultaneously turned on every time are the same.

7. The method for acquiring face and iris images according to claim 5, wherein the positioning of the spot area on the first iris image and calculating the area of the spot area comprises:

S＝(2*n*x*tan(θ/2)/m) ² *n’/n；

8. The utility model provides a people's face and iris image acquisition device which characterized in that, people's face camera lens and iris camera lens are installed simultaneously on first cloud platform, and people's face camera lens and iris camera lens carry out image acquisition simultaneously in real time, and the light filling light source is installed on the second cloud platform, the device includes:

9. A computer readable storage medium for face and iris image acquisition, comprising a memory for storing processor executable instructions which, when executed by the processor, implement steps comprising the face and iris image acquisition method of any of claims 1 to 7.

10. An apparatus for face and iris image acquisition comprising at least one processor and a memory storing computer executable instructions which, when executed by the processor, implement the steps of the face and iris image acquisition method of any one of claims 1 to 7.